Darktrace Model Breach

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Id	a3c7b8ed-56a9-47b7-98e5-2555c16e17c9
Rulename	Darktrace Model Breach
Description	This rule creates Microsoft Sentinel Alerts based on Darktrace Model Breaches, fetched every 5 minutes.
Severity	Medium
Required data connectors	DarktraceRESTConnector
Kind	NRT
Query frequency	5m
Query period	5m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Darktrace/Analytic Rules/CreateAlertFromModelBreach.yaml
Version	1.1.0
Arm template	a3c7b8ed-56a9-47b7-98e5-2555c16e17c9.json

KQL

darktrace_model_alerts_CL 
| where dtProduct_s =="Policy Breach"
| project-rename EventSeverity=score_d, EventStartTime=breachTime_s, NetworkRuleName=modelName_s, NetworkRuleNumber=pid_d, ThreatId=threatID_d, ThreatCategory=dtProduct_s, SrcIpAddr=SourceIP, SrcHostname=hostname_s, SrcMacAddr=sourceMac_s, SrcPortNumber=sourcePort_s, DstIpAddr=destIP_s, DstPortNumber=destPort_s, DstHostname=destHost_s, DstMacAddr=destMac_s, DtCompliance=compliance_b, DtClientSensor=cSensor_b, DtDescription=description_s, DtAntigena=antigena_b, DtDeviceID=deviceId_d, DtSubnetID=sid_d, DtTags=tags_s, DtMitreTechniques=mitreTechniques_s, DtMessage=Message, DtUUID=uuid_g, DtBreachURL=breachUrl_s, DtSrcTypeLabel=typeLabel_s, DtTriggeredComponents=triggeredComponents_s, DtDetails=details_s, DtLongitude=longitude_d, DtLatitude=latitude_d, DtCategory=Category
| extend EventCount=1, EventType="NetworkSession", EventSchema="NetworkSession", EventSchemaVersion="0.2.2", EventResult="Success", DvcAction = "Allow", EventVendor = "Darktrace", EventProduct = "Darktrace DETECT", EventEndTime=EventStartTime, ThreatName=NetworkRuleName, ThreatRiskLevel=EventSeverity
| extend DtSentinelCategory = case(DtCategory == "Suspicious", "Medium", 
                                  DtCategory == "Critical", "High",
                                  "Informational")

YAML

queryFrequency: 5m
eventGroupingSettings:
  aggregationKind: AlertPerResult
id: a3c7b8ed-56a9-47b7-98e5-2555c16e17c9
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Darktrace/Analytic Rules/CreateAlertFromModelBreach.yaml
query: |
  darktrace_model_alerts_CL 
  | where dtProduct_s =="Policy Breach"
  | project-rename EventSeverity=score_d, EventStartTime=breachTime_s, NetworkRuleName=modelName_s, NetworkRuleNumber=pid_d, ThreatId=threatID_d, ThreatCategory=dtProduct_s, SrcIpAddr=SourceIP, SrcHostname=hostname_s, SrcMacAddr=sourceMac_s, SrcPortNumber=sourcePort_s, DstIpAddr=destIP_s, DstPortNumber=destPort_s, DstHostname=destHost_s, DstMacAddr=destMac_s, DtCompliance=compliance_b, DtClientSensor=cSensor_b, DtDescription=description_s, DtAntigena=antigena_b, DtDeviceID=deviceId_d, DtSubnetID=sid_d, DtTags=tags_s, DtMitreTechniques=mitreTechniques_s, DtMessage=Message, DtUUID=uuid_g, DtBreachURL=breachUrl_s, DtSrcTypeLabel=typeLabel_s, DtTriggeredComponents=triggeredComponents_s, DtDetails=details_s, DtLongitude=longitude_d, DtLatitude=latitude_d, DtCategory=Category
  | extend EventCount=1, EventType="NetworkSession", EventSchema="NetworkSession", EventSchemaVersion="0.2.2", EventResult="Success", DvcAction = "Allow", EventVendor = "Darktrace", EventProduct = "Darktrace DETECT", EventEndTime=EventStartTime, ThreatName=NetworkRuleName, ThreatRiskLevel=EventSeverity
  | extend DtSentinelCategory = case(DtCategory == "Suspicious", "Medium", 
                                    DtCategory == "Critical", "High",
                                    "Informational")   
queryPeriod: 5m
kind: NRT
customDetails:
  SrcMacAddr: SrcMacAddr
  DstPortNumber: DstPortNumber
  EventSeverity: EventSeverity
  DtDeviceID: DtDeviceID
  EventStartTime: EventStartTime
  NetworkRuleName: NetworkRuleName
  DstMacAddr: DstMacAddr
  ThreatId: ThreatId
  DtCompliance: DtCompliance
  SrcPortNumber: SrcPortNumber
  DtSentinelCategory: DtSentinelCategory
  DtDescription: DtDescription
  NetworkRuleNumber: NetworkRuleNumber
  DtCategory: DtCategory
name: Darktrace Model Breach
triggerThreshold: 0
relevantTechniques: 
entityMappings:
- fieldMappings:
  - identifier: HostName
    columnName: SrcHostname
  entityType: Host
- fieldMappings:
  - identifier: HostName
    columnName: DstHostname
  entityType: Host
- fieldMappings:
  - identifier: Address
    columnName: SrcIpAddr
  entityType: IP
- fieldMappings:
  - identifier: Address
    columnName: DstIpAddr
  entityType: IP
requiredDataConnectors:
- connectorId: DarktraceRESTConnector
  dataTypes:
  - darktrace_model_alerts_CL
version: 1.1.0
severity: Medium
alertDetailsOverride:
  alertDescriptionFormat: '{{DtMessage}}'
  alertDynamicProperties:
  - alertProperty: AlertLink
    value: DtBreachURL
  - alertProperty: ProviderName
    value: EventVendor
  - alertProperty: ProductName
    value: EventProduct
  - alertProperty: ProductComponentName
    value: ThreatCategory
  - alertProperty: Severity
    value: DtSentinelCategory
  alertTacticsColumnName: 
  alertSeverityColumnName: 
  alertDisplayNameFormat: 'Darktrace: {{ThreatRiskLevel}} - {{NetworkRuleName}}'
description: |
    'This rule creates Microsoft Sentinel Alerts based on Darktrace Model Breaches, fetched every 5 minutes.'
tactics:

ARM